Experimental Investigation of One-pass and Two-pass Friction Stir Welding Process of Aluminum Alloy 6061 with and without Copper Foil
محورهای موضوعی : Welding , Brazing, NDT
Qadarat Mohammad Jassim Al-Issawii
1
(Department of Mechanical Engineering, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran)
Maziar Mahdipour Jalilian
2
(Department of Mechanical Engineering, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran)
Mahdi Karami Khorramabadi
3
(Department of Mechanical Engineering, Khorramabad Branch, Islamic Azad University, Khorramabad, Iran)
کلید واژه: Friction stir welding, Double pass welding, Copper interlayer, Aluminum alloy, Weld strength.,
چکیده مقاله :
In this research, two methods of conventional Friction Stir Welding (FSW) and two-pass friction stir welding have been used to weld AA6061-T6 alloy parts with a copper interlayer (copper foil. Based on the results, it was determined that the number of welding passes, the presence or absence of copper foil as an interlayer, the number of welding passes, the direction of tool rotation and the direction of tool movement in the second pass strongly affect the strength and ductility of FSW. According to the results, the highest tensile strength and ductility belong to TP-D(Two-Pass, type D), TP-B(Two-Pass, type B), TP-C(Two-Pass, type C), TP-A(Two-Pass, type A), CF-Cu and CF(Conventional FSW) samples, respectively. The mentioned samples have growth of 21, 29, 45, 36 and 58% respectively compared to the CF sample. The highest strength growth was related to the TP-D sample, which experienced a 58% increase in tensile strength compared to the CF sample. The tensile strength efficiency of this sample is 89.3% compared to the base metal. The highest increase in ductility was related to the TP-D sample, which experienced a 35% increase in ductility compared to the CF sample. The ductility efficiency of this sample is 81.1% compared to the base metal.
In this research, two methods of conventional Friction Stir Welding (FSW) and two-pass friction stir welding have been used to weld AA6061-T6 alloy parts with a copper interlayer (copper foil. Based on the results, it was determined that the number of welding passes, the presence or absence of copper foil as an interlayer, the number of welding passes, the direction of tool rotation and the direction of tool movement in the second pass strongly affect the strength and ductility of FSW. According to the results, the highest tensile strength and ductility belong to TP-D(Two-Pass, type D), TP-B(Two-Pass, type B), TP-C(Two-Pass, type C), TP-A(Two-Pass, type A), CF-Cu and CF(Conventional FSW) samples, respectively. The mentioned samples have growth of 21, 29, 45, 36 and 58% respectively compared to the CF sample. The highest strength growth was related to the TP-D sample, which experienced a 58% increase in tensile strength compared to the CF sample. The tensile strength efficiency of this sample is 89.3% compared to the base metal. The highest increase in ductility was related to the TP-D sample, which experienced a 35% increase in ductility compared to the CF sample. The ductility efficiency of this sample is 81.1% compared to the base metal.
[1]Kou, S. 2003. Welding metallurgy. New Jersey: Cambridge University Press.
[2]Mathers, G. 2002. The Welding of Aluminium and its Alloys. Abington: Elsevier.
[3] Radhakrishnan, V.M. 2005. Welding Technology and Design. New Age International.
[4] Kovacevic, R. 2012. Welding processes. IntechOpen.
[5] Aziz, S.B., Dewan, M.W., Huggett, D.J., Wahab, M.A., Okeil, A.M. and Warren Liao, T. 2016. Impact of Friction Stir Welding (FSW) process parameters on thermal modeling and heat generation of aluminum alloy joints. Acta Metallurgica Sinica. 29:869-883. doi:10.1007/s40195-016-0466-2.
[6] Kumar, K.A. 2022. Effect of tool plunge depth (TPD) on the microstructure and mechanical properties of FSW dissimilar joints reinforced with SiC nano particles. Materials Today: Proceedings, 52:355-360. doi:10.1016/j.matpr.2021.09.056.
[7] Zheng, Q., Feng, X., Shen, Y., Huang, G. and Zhao, P. 2017. Effect of plunge depth on microstructure and mechanical properties of FSW lap joint between aluminum alloy and nickel-base alloy. Journal of Alloys and compounds, 695:952-961. doi:10.1016/j.jallcom.2016.10.213.
[8] Su, J.Q., Nelson, T.W. and Sterling, C.J. 2005. Microstructure evolution during FSW/FSP of high strength aluminum alloys. Materials Science and Engineering: A. 405(1-2):277-286. doi:10.1016/j.msea.2005.06.009.
[9] Morishige, T., Kawaguchi, A., Tsujikawa, M., Hino, M., Hirata, T. and Higashi, K. 2008. Dissimilar welding of Al and Mg alloys by FSW. Materials transactions. 49(5):1129-1131. doi:10.1016/j.scriptamat.2009.06.022.
[10] Li, J.Q. and Liu, H.J. 2013. Characteristics of the reverse dual-rotation friction stir welding conducted on 2219-T6 aluminum alloy. Materials & Design. 45: 148-154. doi:10.1016/j.matdes.2012.08.068.
[11] Liu, H.J., Li, J.Q. and Duan, W.J. 2013. January. Research on reverse dual rotation friction stir welding process. In Proceedings of the 1st International Joint Symposium on Joining and Welding. Woodhead Publishing. doi:10.1533/978-1-78242-164-1.25.
[12] Li, J.Q. and Liu, H.J. 2015. Effects of the reversely rotating assisted shoulder on microstructures during the reverse dual-rotation friction stir welding. Journal of Materials Science & Technology. 31(4): 375-383. doi:10.1016/j.jmst.2014.07.020.
[13] Shi, L., Wu, C.S. and Liu, H.J., 2015. The effect of the welding parameters and tool size on the thermal process and tool torque in reverse dual-rotation friction stir welding. International Journal of Machine Tools and Manufacture. 91: 1-11. doi:10.1016/j.ijmachtools.2015.01.004.
[14] Thomas, W.M., Staines, D.J., Watts, E.R. and Norris, I.M. 2005. The simultaneous use of two or more friction stir welding tools (Technical report). Abington, Cambridge.
[15] Manjunath, M., S. Subramanian Pillappan, and S. Kurse, 2024. Process parameter analysis of double pass friction stir composite welds. Materials and Manufacturing Processes. 39(2):174-187. doi:10.1080/10426914.2023.2190380.
[16] ASTM, A. 2021. E8/E8M standard test methods for tension testing of metallic materials, Annu. B. ASTM St.
[17] ASTM, A. 2011. Standard test method for microindentation hardness of materials. ASTM International West Conshohocken.
